Development of Microwave CT Device for Breast Cancer Diagnostics

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K12564
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Medical systems
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Nagayama Yoshio 核融合科学研究所, ヘリカル研究部, 教授 (10126138)
• Co-Investigator(Renkei-kenkyūsha): TSUCHIYA HAYATO 核融合科学研究所, ヘリカル研究部, 助教 (90509522)
• Research Collaborator: IWAMA NAOFUMI ; TANAKA TOSHIYUKI 長崎大学, 工学研究科, 准教授 ; FUJIMOTO TAKAFUMI 長崎大学, 工学研究科, 准教授
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: マイクロ波CT / 順次照射 / 同時受信 / 誘電体積層ダイポールアンテナ

Outline of Final Research Achievements

A microwave CT mammography device has been developed. Dielectric Laminating Dipole Antenna with Shield (DiLDAS) has been developed for the transmitters and the receivers. In order to reduce the reflection on the breast, an FRP breast cup, of which permittivity is similar to that of the fat tissue, is attached the human breast. Number of transmitters is 16 and each of them is switched by the RF switch to the output of the microwave synthesizer of which frequency is scanned from 0.8 to 6.4 GHz. Number of receivers is 51 and each of them is connected to an IF amplifier, a logarithmic power detector and an IQ demodulator. All data are simultaneously sampled by 14 bits digitizers. In the preliminary experiment, the power of the scattered wave with the polarization perpendicular to the incident wave is significantly increased in higher frequencies. The direction of research and development is clarified to complete the microwave CT mammography device.

Free Research Field

マイクロ波計測